Cap Hexagon Head Screw P/N B1821BH044F225N

Specifications

Hardness rating

Overall Rockwell C Minimum 32.0 and Rockwell C Maximum 38.0

Surface treatment document and classification

Overall Assn STD Single Treatment Response Ast- B633 TY 2 SC 3

Surface treatment

Overall Zinc and Chromate

Fastener length

2.156–2.250 in

Material

Overall Steel

Thread quantity per inch

20

Thread class

2A

Thread series designator

UNF

Nondefinitive spec/std data

Type 2 and Style 10 and Grade 8

Width between flats

0.612–0.625 in

Nominal thread diameter

Inches 0.438

Thread direction

Right-Hand

Thread length

1.125–1.313 in

Minimum tensile strength

Pounds Per Square Inch 150000

Material document and classification

Overall Assn STD Single Material Response SAE J429 GR8

Head height

0.272–0.291 in

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

Cross-reference part numbers

B1821BH044F225N 856638-00 MS90727-92

Also referenced as

181675

Older, superseded, advisory or drawing numbers the federal catalog associates with this NSN — the ones in an old manual.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	EA each
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.

In business since 1951 · 30,000+ contracts completed · about SECO & our policies · more questions answered

FAQ

What is NSN 5305-00-709-8526?
NSN 5305-00-709-8526 (5305007098526) — Cap Hexagon Head Screw: SECO Parts has 675 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for cap hexagon head screw in federal supply class 5305 (Screws).

Is NSN 5305-00-709-8526 available?
SECO Parts has 675 in stock in Augusta, GA — order or request a quote below.

How much does NSN 5305-00-709-8526 cost?
NSN 5305-00-709-8526 is a low-cost part, so SECO quotes it by the line rather than by the piece: there is a $50 minimum per line, and quantity pricing on request — usually answered the same business day.

What part numbers cross-reference to NSN 5305-00-709-8526?
Part numbers that cross-reference this NSN include B1821BH044F225N, 856638-00, MS90727-92. It is also referenced by older, superseded or advisory numbers: 181675. SECO can quote against any of them.