Machine Bolt P/N NASM3 THRU NASM20-AN4H15

Specifications

Thread length

0.468 in minimum

Fastener length

1.656 in (nominal)

Material document and classification

Overall MIL Spec All Material Responses -IL-B-6812

Head height

0.140–0.172 in

Shank unthreaded hole diameter

First Hole Inches Minimum 0.076

Hole type

Drilled

Grip length

1.188 in (nominal)

Hole quantity

1

Thread class

3A

Thread direction

Right-Hand

Width between flats

0.428–0.440 in

Hole diameter

0.046 in (nominal)

Hardness rating

Overall Rockwell C Minimum 26.0 and Rockwell C Maximum 32.0

Material

Overall Steel Comp 4037 or Steel Comp 4130 or Steel Comp 8630 or Steel Comp 8735 or Steel Comp 8740 or Steel Comp 4140

Surface treatment

Overall Cadmium and Chromate

Surface treatment document and classification

Overall Fed Spec All Treatment Responses QQ--416 TY 2 CL 3

Thread series designator

UNF

Thread quantity per inch

28

Nominal thread diameter

Inches 0.250

Distance from head largest bearing surface to shank hole center

First Hole Inches Nominal 1.500

Features provided

Finished Head

Minimum tensile strength

Pounds Per Square Inch 125000

From the federal catalog's item characteristics for this NSN. Confirm critical dimensions against your part or drawing before ordering.

Cross-reference part numbers

NASM3 THRU NASM20-AN4H15

Also referenced as

AN4H15 AN4H14

Older, superseded, advisory or drawing numbers the federal catalog associates with this NSN — the ones in an old manual. They find the item; confirm the current part number when you order.

Shown for identification only. SECO can quote against any of these numbers.

Logistics data

Source of supply	SMS DLA Land and Maritime, Columbus, Ohio
Acquisition advice code	D DLA/GSA stocked — stocked by DLA or GSA and issued from central stock
Unit of issue	HD hundred
Demilitarization code	A Demilitarization not required — non-munitions-list item
Controlled inventory code	U Unclassified
Hazardous material indicator	N No hazardous material

Source: public FLIS/PUB LOG cataloging data.

Why buy from SECO

These quantities sit on our own shelves — we are a stocking supplier, not a broker sourcing after you order. Condition-coded stock, formal quotes with NSN/PN on the paperwork, POs and GPC welcome, fast U.S. shipping.

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FAQ

What is NSN 5306-00-180-3350?
NSN 5306-00-180-3350 (5306001803350) — Machine Bolt: SECO Parts has 100 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for machine bolt in federal supply class 5306 (Bolts).

Is NSN 5306-00-180-3350 available?
SECO Parts has 100 in stock in Augusta, GA — order or request a quote below.

How much does NSN 5306-00-180-3350 cost?
SECO quotes NSN 5306-00-180-3350 on request, usually the same business day.

What part numbers cross-reference to NSN 5306-00-180-3350?
Part numbers that cross-reference this NSN include NASM3 THRU NASM20-AN4H15. It is also referenced by older, superseded or advisory numbers: AN4H15, AN4H14. SECO can quote against any of them.