Karna International

Product family

Bolts, Screws & Anchors

General and specialty bolts, eye bolts, automotive and structural bolts, and U, J and L bolts. Cold-forged bolts are manufactured on 8 bolt makers and 2 headers, with 6 friction screw presses dedicated to bolt forging; automotive bolts are then machined where required and heat treated. U, J and L bolts are manufactured by cold hydraulic pressing or hot forging, with threaded safety caps on request. Alongside them: drywall, chipboard, concrete, tapping, self-drilling, wood and machine screws, and drop-in, through-bolt and shield anchors.

Call +1 (415) 725-9165 or WhatsApp, Mon–Sat, 9:30–18:30 IST

Standards
IFI, ANSI, ASME, SAE, ASTM, DIN, ISO, JIS, USS, BS, or to customer drawing
Materials
Mild steel, Carbon steel, Stainless steel (SS 304, SS 316), Silicon bronze, Aluminium
Finishes, done in-house
  • Plain (self colour)
  • Hot-dip galvanizing
  • Zinc plating in white, blue, black, yellow or green, all with trivalent (Cr3+) passivation — hexavalent-chromium-free
  • Black phosphating
  • Autoblack
  • Magni coating
  • Gleitmo wax coating
  • GEOMET coating
  • Powder coating
Other finishes
PVC coated, Rustic black

Product lines

132 lines

General & specialty bolts

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Sizes
M6–M52 / 1/4"–2" UNC/UNF
Lengths
10–300 mm / 1/2"–8"; hot forged hex and square head bolts to 500 mm / 20"
Metric grades
4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 10.9; stainless steel A2-50, A2-70, A4-50, A4-70
Inch grades
SAE J429 Grade 1, 2, 5, 8; ASTM A307 Grade A, B, C; ASTM A449 Type 1; ASTM A354 Grade BC, BD
Finishes
Plain, bright zinc plated, yellow zinc plated or hot-dip galvanized. All our zinc plating is trivalent (Cr3+).
Metric standards
DIN 931, 933, 960, 961, 601, 558, 7990; ISO 4014, 4015, 4016, 4017; AS 1111; ASME B18.2.3.1M
Inch standards
ASME B18.2.1, AS 1390

Other sizes on request.

Bolts, Screws & Anchors: General & specialty bolts
ProductSizesLengthGradeQuote
Anti-theft bolt
Security bolt
Button head bolt
Serrated flange bolt
Tension bolt-nut
Large U-bolt
V-bolt
T-bolt
M12–M24 / 1/2"–1"
to 200 mm / 8"
4.6, 8.8
Countersunk bolt
Hex boltCold forged M6–M24 / 1/4"–1", to 150 mm / 6"; hot forged M27–M52 / 1-1/8"–2", to 500 mm / 20".
M6–M52 / 1/4"–2"
to 500 mm / 20"
4.6, 8.8, 10.9
Flange bolt
High strength structural bolt
Toggle bolt
Hex screwHex set screw, fully threaded. Cold and hot forged.
M6–M20 / 1/4"–3/4"
to 150 mm / 6"
4.6, 5.6, 8.8
Hanger bolt
Square head boltNot in the printed catalogue, but we supply it.
M12–M24 / 1/2"–1"
to 500 mm / 20"
4.6, 8.8
Roofing boltNot in the printed catalogue, but we supply it.
M6–M10 / 1/4"–3/8"
to 100 mm / 4"
4.6

Eye bolts

Download catalogue

Every product family, with standards and size ranges. Tell us who you are and we’ll email you a link to read and download it, opening at page 2.

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Bolts, Screws & Anchors: Eye bolts
ProductSizesLengthQuote
Turbo eye bolt
Eye boltWith nuts.
M10–M24 / 3/8"–1"
to 300 mm / 12"
Square eye bolt
Thimble eye bolt
Open eye bolt
Rotating eye bolt
Mini eye bolt
Triangular eye bolt
Aluminium eye bolt
Concrete screw eye bolt
Collared eye bolt
Hook eye bolt
Flat head eye bolt
Pig tail eye bolt
Hot line clamp eye bolt
Heavy duty eye bolt
Metric eye bolt
Galvanized eye bolt
Marine eye bolt

Automotive & structural bolts

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Every product family, with standards and size ranges. Tell us who you are and we’ll email you a link to read and download it, opening at page 3.

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Bolts, Screws & Anchors: Automotive & structural bolts
ProductSizesLengthGradeQuote
Drain plug
Full thread serrated bolt
Hex flange bolt
Metric flange bolt
Mild steel hexagonal left-hand thread bolt
Chamber bolt
Alignment chamber bolt with nut
Mild steel automotive bolt
Chamber bolt, 3mm diameter
Automobile chamber bolt
Stainless steel chamber bolt
Wheel adjustment chamber bolt
Brake chamber cage bolt
Oil chamber nut
Engine mounting bolt
Engine mounting stud bolt
Hub bolt
Hub wheel bolt
Unimotive hub bolt
Wheel stud hub bolt
Carriage anchor bolt
Metric carriage bolt & nutCup square bolt.
M6–M24 / 1/4"–1"
to 300 mm / 12"
4.6, 8.8
Carriage bolt & nut
Rustic black carriage bolt
Socket screw
Socket head Allen bolt
High tensile Allen bolt
Allen key bolt
Structural bolt with nut and washerCold and hot forged.Not in the printed catalogue, but we supply it.
M12–M30 / 1/2"–1-1/4"
to 300 mm / 12"
4.6, 5.6, 8.8

U, J & L bolts

Features:Rubber lined

Download catalogue

Every product family, with standards and size ranges. Tell us who you are and we’ll email you a link to read and download it, opening at page 4.

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Bolts, Screws & Anchors: U, J & L bolts
ProductSizesGradeQuote
U joint U-bolt
Forged automotive U-bolt
Heavy duty U-bolt
Round PVC coated U-bolt
U-boltWith nuts.
M6–M20 / 1/4"–3/4"
4.6
Round automotive U-bolt
Automotive U-bolt
Iron forged round U-bolt
Forged U-bolt
Rubber lined U-bolt
Extended leg non-gripped U-bolt
Gripped anchor anti-vibration rubber lined U-bolt
Anti-chafe thin wall silicone rubber lined U-bolt
Anti-vibration rubber lined U-bolt
Stainless steel square U-bolt
Square C-bolt
Hot dip galvanized square U-bolt
J-bolt
L-bolt
Hook U-bolt
N-bolt
Double U-bolt

Screws

Heads
Countersunk, double countersunk, pan, wafer, truss, hex and flat round
Drives
Phillips, slotted and hexalobular (star)
Bolts, Screws & Anchors: Screws
ProductQuote
Drywall screw
Chipboard screw
Concrete screwWith or without a rubber washer.
Tapping screw
Self-drilling screw, hex washer head
Self-drilling screw, countersunk Phillips
Wood screw
Machine screw

Drop-in anchors

Anchor finish
Yellow zinc plated, trivalent (Cr3+)

Other sizes on request.

Bolts, Screws & Anchors: Drop-in anchors
ProductThreadLengthDrill ØQuote
Drop-in anchor
M6 / 1/4"
25 mm / 1"
8 mm
Drop-in anchor
M8 / 5/16"
30 mm / 1-1/4"
10 mm
Drop-in anchor
M10 / 3/8"
40 mm / 1-1/2"
12 mm
Drop-in anchor
M12 / 1/2"
50 mm / 2"
15 mm
Drop-in anchor
M16 / 5/8"
65 mm / 2-1/2"
20 mm
Drop-in anchor
M20 / 3/4"
80 mm / 3-1/4"
25 mm
Drop-in anchor, lipped
M8 / 5/16"
30 mm / 1-1/4"
10 mm
Drop-in anchor, lipped
M10 / 3/8"
30 mm / 1-1/4"
12 mm
Drop-in anchor setting tool
M6 / 1/4"
Drop-in anchor setting tool
M8 / 5/16"
Drop-in anchor setting tool
M10 / 3/8"
Drop-in anchor setting tool
M12 / 1/2"
Drop-in anchor setting tool
M16 / 5/8"
Drop-in anchor setting tool
M20 / 3/4"

Through-bolt anchors

Finish
Bright zinc plated, trivalent (Cr3+)
Fixing thickness
Maximum, for each size

Other sizes on request.

Bolts, Screws & Anchors: Through-bolt anchors
ProductLengthDrill ØFixing thicknessQuote
Through-bolt anchor
65 mm / 2-1/2"
8 mm
20 mm
Through-bolt anchor
80 mm / 3-1/4"
8 mm
35 mm
Through-bolt anchor
100 mm / 4"
8 mm
55 mm
Through-bolt anchor
75 mm / 3"
10 mm
18 mm
Through-bolt anchor
90 mm / 3-1/2"
10 mm
33 mm
Through-bolt anchor
120 mm / 5"
10 mm
63 mm
Through-bolt anchor
80 mm / 3-1/4"
12 mm
5 mm
Through-bolt anchor
100 mm / 4"
12 mm
25 mm
Through-bolt anchor
140 mm / 6"
12 mm
65 mm
Through-bolt anchor
180 mm / 7"
12 mm
105 mm

Shield anchors

Other sizes on request.

Bolts, Screws & Anchors: Shield anchors
ProductThreadLengthDrill ØFixing thicknessQuote
Shield anchor, loose bolt
M8 / 5/16"
60 mm / 2-1/4"
14 mm
10 mm
Shield anchor, loose bolt
M8 / 5/16"
75 mm / 3"
14 mm
25 mm
Shield anchor, loose bolt
M8 / 5/16"
90 mm / 3-1/2"
14 mm
40 mm
Shield anchor, loose bolt
M10 / 3/8"
70 mm / 2-3/4"
16 mm
10 mm
Shield anchor, loose bolt
M10 / 3/8"
85 mm / 3-1/4"
16 mm
25 mm
Shield anchor, loose bolt
M10 / 3/8"
110 mm / 4"
16 mm
50 mm
Shield anchor, loose bolt
M10 / 3/8"
135 mm / 5"
16 mm
75 mm
Shield anchor, loose bolt
M12 / 1/2"
85 mm / 3-1/4"
20 mm
10 mm
Shield anchor, loose bolt
M12 / 1/2"
100 mm / 4"
20 mm
25 mm
Shield anchor, shield only
M8 / 5/16"
50 mm / 2"
14 mm
Shield anchor, shield only
M10 / 3/8"
60 mm / 2-1/4"
16 mm
Shield anchor, shield only
M12 / 1/2"
80 mm / 3-1/4"
20 mm
Shield anchor, shield only
M16 / 5/8"
100 mm / 4"
25 mm

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Call +1 (415) 725-9165 or WhatsApp, Mon–Sat, 9:30–18:30 IST