PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20-2-51Setscrew

Sancor Corp · NSN 5305-00-864-5721 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-864-5721 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-864-5721. Primary manufacturer part number: 20-2-51.
Features
  • Setscrew — FSC 5305
  • Thread Length: 0.700 INCHES MINIMUM IN
  • Internal Drive Style: SLOT
  • Head Diameter: 0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
  • Material: STEEL OVERALL
  • Surface Treatment: PHOSPHATE OVERALL
  • Material Document and Classification: ASTM A108 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A576 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Thread Series Designator: UNF
Applications
  • Applications requiring Steel Overall construction
General Description

The Setscrew, cataloged under National Stock Number 5305-00-864-5721, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Sancor Corp. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-00-864-5721
Primary Part Number20-2-51
Item NameSetscrew
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerSancor Corp
StatusACTIVE
Thread Length0.700 INCHES MINIMUM IN
Internal Drive StyleSLOT
Head Diameter0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
MaterialSTEEL OVERALL
Surface TreatmentPHOSPHATE OVERALL
Material Document and ClassificationASTM A108 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A576 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Thread Series DesignatorUNF
Surface Treatment Document and ClassificationMIL-P-16232 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
Head StyleFLAT CHAMFER
Fastener Length1.000 INCHES NOMINAL IN
Thread Class2A A
Thread Quantity Per Inch20
Thread DirectionRIGHT-HAND
Point StyleFLAT
Nominal Thread Diameter0.500 INCHES IN
Head Height0.300 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5315-00-027-202520251 INTERCHANGEABLE
Pin,straight,headless
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
5999-00-035-8709 INTERCHANGEABLE
Contact,electrical
5315-00-198-5967103574 INTERCHANGEABLE
Pin,tapered,plain
Us Army Aviation and Missile Command
5340-00-351-35922025-1 INTERCHANGEABLE
Clip,spring Tension
Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch
5325-00-351-5220202037 INTERCHANGEABLE
Ring,retaining
Kidde-Fenwal, Llc
2995-00-724-0151 INTERCHANGEABLE
Pilot,valve
5360-01-007-839303187003211 INTERCHANGEABLE
Spring,helical,compression
Anderson Greenwood Lp Dba Anderson Greenwood Crosby
8040-01-154-0038 INTERCHANGEABLE
Adhesive
5962-01-169-6663MC14025AL INTERCHANGEABLE
Microcircuit,digital
Freescale Semiconductor, Inc.
4820-01-174-899320251-3-926SS INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Cross-Reference Index
Part NumberManufacturer
20-2-51 Sancor Corp (USA)
Related Parts
5315-00-027-2025INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
20251
5999-00-035-8709INTERCHANGEABLE
CONTACT,ELECTRICAL
5315-00-198-5967INTERCHANGEABLE
PIN,TAPERED,PLAIN
103574
5340-00-351-3592INTERCHANGEABLE
CLIP,SPRING TENSION
2025-1
5325-00-351-5220INTERCHANGEABLE
RING,RETAINING
202037
2995-00-724-0151INTERCHANGEABLE
PILOT,VALVE
5360-01-007-8393INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
03187003211
8040-01-154-0038INTERCHANGEABLE
ADHESIVE
5962-01-169-6663INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
MC14025AL
4820-01-174-8993INTERCHANGEABLE
VALVE,SAFETY RELIEF
20251-3-926SS
4820-01-187-1970INTERCHANGEABLE
VALVE,SAFETY RELIEF
20251-8-926SS
4820-01-193-3462INTERCHANGEABLE
RING,REGULATING,VALVE
20251 PIECE 5

Frequently Asked Questions

What is NSN 5305-00-864-5721?

NSN 5305-00-864-5721 is a Setscrew, manufactured by Sancor Corp, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-864-5721?

NSN 5305-00-864-5721 has 1 cross-referenced part number: 20-2-51 (Sancor Corp).

What NSN replaces 5305-00-864-5721?

There are 12 known substitutes for 5305-00-864-5721: 5315-00-027-2025, 5999-00-035-8709, 5315-00-198-5967 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20-2-51?

Key specifications for 20-2-51: Thread Length: 0.700 INCHES MINIMUM IN; Internal Drive Style: SLOT; Head Diameter: 0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Material: STEEL OVERALL. 16 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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