NSN 5306-01-166-4524 — this item is cataloged by the U.S. Government under National Stock Number 5306-01-166-4524. Manufacturer of record part number: AS21521.
Also searched as5306-01-166-4524 ·
5306011664524 ·
NIIN 011664524 ·
01-166-4524 ·
FSC 5306 Bolts · CAGE K7766 · AS21521
Extended Washer Thickness: 0.060 INCHES NOMINAL IN
Head Height: 0.144 INCHES NOMINAL IN
Fastener Length: 1.312 INCHES NOMINAL IN
Extended Washer Diameter: 0.436 INCHES NOMINAL IN
Thread Length: 0.750 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN
Material Document and Classification: DTD 5026,FSCM K7766 MFR REF SINGLE MATERIAL RESPONSE OVERALL
Nominal Thread Diameter: 0.250 INCHES IN
Identification
NSN: 5306-01-166-4524
NIIN: 011664524
FSC: 5306 — Bolts
FSG: 53 — Hardware and Abrasives
Primary part number: AS21521
Manufacturer: Bsi Standards Limited
General Description
The Bolt,machine, cataloged under National Stock Number 5306-01-166-4524, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Bsi Standards Limited. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5306-01-166-4524
Primary Part Number
AS21521
Item Name
Bolt,machine
FSC / FSG
5306 / 53 — Bolts
Manufacturer
Bsi Standards Limited
Status
ACTIVE
Extended Washer Thickness
0.060 INCHES NOMINAL IN
Head Height
0.144 INCHES NOMINAL IN
Fastener Length
1.312 INCHES NOMINAL IN
Extended Washer Diameter
0.436 INCHES NOMINAL IN
Thread Length
0.750 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN
Material Document and Classification
DTD 5026,FSCM K7766 MFR REF SINGLE MATERIAL RESPONSE OVERALL
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276
5306-00-001-1276 · Item name not on file
5306-00-001-1949
5306-00-001-1949 · Item name not on file
5306-00-001-1988
5306-00-001-1988 · Item name not on file
5306-00-001-1989
5306-00-001-1989 · Item name not on file
5306-00-001-1990
5306-00-001-1990 · Item name not on file
5306-00-001-1991
5306-00-001-1991 · Item name not on file
5306-00-001-1993
BOLT,SHEAR
5306-00-001-2017
BOLT,MACHINE
Frequently Asked Questions
What is NSN 5306-01-166-4524?
NSN 5306-01-166-4524 is a Bolt,machine, manufactured by Bsi Standards Limited, classified under FSC 5306, Bolts. Status: active.
What part numbers are listed for NSN 5306-01-166-4524?
NSN 5306-01-166-4524 has 2 manufacturer part numbers on file: AS21521 (Sps Technologies Ltd, Tj Brooks Division), AS21521 (Bsi Standards Limited).
What are the specifications of AS21521?
Key specifications for AS21521: Extended Washer Thickness: 0.060 INCHES NOMINAL IN; Head Height: 0.144 INCHES NOMINAL IN; Fastener Length: 1.312 INCHES NOMINAL IN; Extended Washer Diameter: 0.436 INCHES NOMINAL IN. 14 specifications are documented in the U.S. Government catalog.
Is NSN 5306-01-166-4524 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.