Bolt, Ring5306-01-388-1818

NSN 5306-01-388-1818 · NIIN 013881818 · Part number 21237L

Puritas Metal Products Inc · FSC 5306 — Bolts · FSG 53 — Hardware and Abrasives · CAGE 04368

Government record, cited

NSN 5306-01-388-1818 — this item is cataloged by the U.S. Government under National Stock Number 5306-01-388-1818. Manufacturer of record part number: 21237L.

Also searched as 5306-01-388-1818 · 5306013881818 · NIIN 013881818 · 01-388-1818 · FSC 5306 Bolts · CAGE 04368 · 21237L

Nearby stock numbers ← 5306-01-388-1817 Bolt, Machine · 5306-01-388-1827 Bolt, Shoulder →

5306-01-388-1818 — Bolts

Features

Bolt,ring — FSC 5306
Thread Length: 1.000 INCHES NOMINAL IN
Nominal Thread Diameter: 1.125 INCHES IN
Thread Direction: RIGHT-HAND
Thread Class: 3A A
Thread Quantity Per Inch: 12
Thread Series Designator: UNF
1 manufacturer part number on file

Identification

NSN: 5306-01-388-1818
NIIN: 013881818
FSC: 5306 — Bolts
FSG: 53 — Hardware and Abrasives
Primary part number: 21237L
Manufacturer: Puritas Metal Products Inc

General Description

The Bolt,ring, cataloged under National Stock Number 5306-01-388-1818, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Puritas Metal Products Inc. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5306-01-388-1818
Primary Part Number	21237L
Item Name	Bolt,ring
FSC / FSG	5306 / 53 — Bolts
Manufacturer	Puritas Metal Products Inc
Status	ACTIVE
Thread Length	1.000 INCHES NOMINAL IN
Nominal Thread Diameter	1.125 INCHES IN
Thread Direction	RIGHT-HAND
Thread Class	3A A
Thread Quantity Per Inch	12
Thread Series Designator	UNF

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
21237L PRIMARY	Puritas Metal Products Inc (USA)

No interchangeability data on file.

Other items in FSC 5306 — Bolts

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 5306-01-388-1818?

NSN 5306-01-388-1818 is a Bolt,ring, manufactured by Puritas Metal Products Inc, classified under FSC 5306, Bolts. Status: active.

What part numbers are listed for NSN 5306-01-388-1818?

NSN 5306-01-388-1818 has 1 manufacturer part number on file: 21237L (Puritas Metal Products Inc).

What are the specifications of 21237L?

Key specifications for 21237L: Thread Length: 1.000 INCHES NOMINAL IN; Nominal Thread Diameter: 1.125 INCHES IN; Thread Direction: RIGHT-HAND; Thread Class: 3A A. 6 specifications are documented in the U.S. Government catalog.

Is NSN 5306-01-388-1818 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.

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