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3/8UNF Hex Bolts Stainless Steel

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3/8” UNF Hex Head Bolts – 316 Stainless Steel for Precision Fastening and Corrosion Resistance

Our 3/8 inch UNF hex head bolts are precision-engineered from durable 316 stainless steel, offering superior corrosion resistance, strength, and fine-thread accuracy. Featuring a Unified National Fine (UNF) thread, these bolts are ideal for applications that require tight tolerances and secure, vibration-resistant fastening.

With a hex head for easy installation, these bolts are trusted in marine, automotive, industrial, and mechanical engineering applications, especially where long-lasting performance and resistance to harsh conditions are critical.

Key Features of 3/8" UNF Stainless Steel Hex Head Bolts:

Manufactured from 316 stainless steel – excellent rust and corrosion resistance
3/8” UNF fine thread – perfect for high-precision fastening and anti-vibration performance
Hex head allows for easy tightening using spanners, wrenches, or sockets
Ideal for automotive, marine, structural, and high-strength mechanical applications
Compatible with UNF stainless steel nuts and washers
Available in a range of lengths to suit various installation needs
Suitable for professional trades, engineering workshops, and industrial use
Supplied in trade or bulk packs, with fast nationwide shipping

Use 3/8” UNF 316 stainless steel hex head bolts where precision and corrosion protection matter most.

To confirm plain shank and thread lengths, check out our specifications table here.

Code	Image	Product Name	Grade	Price
3161561	$Hex Bolt 3\8UNF x 1.1\2 304 x 1$ $Hex Bolt 3\8UNF x 1.1\2 304 x 1$	Hex Bolt 3\8UNF x 1.1\2 304 x 1 More Info	304	$3.05
3161562	$Hex Bolt 3\8UNF x 1.3\4 304 x 1$ $Hex Bolt 3\8UNF x 1.3\4 304 x 1$	Hex Bolt 3\8UNF x 1.3\4 304 x 1 More Info	304	$2.39
3161563	$Hex Bolt 3\8UNF x 2 304 x 1$ $Hex Bolt 3\8UNF x 2 304 x 1$	Hex Bolt 3\8UNF x 2 304 x 1 More Info	304	$4.74
3161564	$Hex Bolt 3\8UNF x 2.1\2 304 x 1$ $Hex Bolt 3\8UNF x 2.1\2 304 x 1$	Hex Bolt 3\8UNF x 2.1\2 304 x 1 More Info	304	$4.34
3161565	$Hex Bolt 3\8UNF x 3 304 x 1$ $Hex Bolt 3\8UNF x 3 304 x 1$	Hex Bolt 3\8UNF x 3 304 x 1 More Info	304	$3.63
3161566	$Hex Bolt 3\8UNF x 3.1\4 304 x 1$ $Hex Bolt 3\8UNF x 3.1\4 304 x 1$	Hex Bolt 3\8UNF x 3.1\4 304 x 1 More Info	304	$10.09
3161567	$Hex Bolt 3\8UNF x 4 304 x 1$ $Hex Bolt 3\8UNF x 4 304 x 1$	Hex Bolt 3\8UNF x 4 304 x 1 More Info	304	$8.10

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3/8UNF Hex Bolts Stainless Steel

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3/8UNF Hex Bolts Stainless Steel

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