PartsTable TECHNICAL DATA SHEET

JULY 2026Technical Data Sheet

5538Setscrew

Name: 5538
SKU: 5305-00-637-0603

Botoman Mfg Co Inc · NSN 5305-00-637-0603 · FSC 5305 · No Item Name Available

Verified by PartsTable

NSN 5305-00-637-0603 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-637-0603. Primary manufacturer part number: 5538.

5305-00-637-0603 — No Item Name Available illustration

Features

Setscrew — FSC 5305
Width Across Flats: 0.078 INCHES NOMINAL IN
Thread Series Designator: UNF
Material: STEEL OVERALL
Nominal Thread Diameter: 0.164 INCHES IN
Internal Drive Style: HEXAGON
Thread Direction: RIGHT-HAND
Thread Class: 3A A

Applications

Applications requiring Steel Overall construction

General Description

The Setscrew, cataloged under National Stock Number 5305-00-637-0603, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Botoman Mfg Co Inc. Government technical data includes 11 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

Parameter	Value
NSN	5305-00-637-0603
Primary Part Number	5538
Item Name	Setscrew
FSC / FSG	5305 / 53 — No Item Name Available
Manufacturer	Botoman Mfg Co Inc
Status	ACTIVE
Width Across Flats	0.078 INCHES NOMINAL IN
Thread Series Designator	UNF
Material	STEEL OVERALL
Nominal Thread Diameter	0.164 INCHES IN
Internal Drive Style	HEXAGON
Thread Direction	RIGHT-HAND
Thread Class	3A A
Fastener Length	0.250 INCHES NOMINAL IN
Thread Length	0.250 INCHES MAXIMUM IN
Thread Quantity Per Inch	36
Point Style	CUP

Lifecycle & Compliance

Acquisition Status	ACTIVE
HAZMAT	No

⇄ Verified Substitutes 12

5905-00-174-8067K45258-500 INTERCHANGEABLE

Resistor,fixed,wire Wound,induct

Ward Leonard Ct Llc

5999-00-325-8999 INTERCHANGEABLE

Delay Line

5950-00-441-78763155896 INTERCHANGEABLE

Transformer,power

Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier

5905-00-677-0568156PS120 INTERCHANGEABLE

Resistor Set,matched

Honeywell International Inc Dba Honeywell International Div New England Instrument (nei)

5935-00-839-70257616239P1 INTERCHANGEABLE

Connector,receptacle,electrical

Lockheed Martin Corporation Div Rms

3460-00-895-244055-38 INTERCHANGEABLE

Indexing Fixture

Safran Test Cells, Inc

6105-00-912-734508TGSM1242-1 INTERCHANGEABLE

Motor-Tachometer Generator

Ametek Technical & Industrial Products, Inc. Dba Tachtronic Instruments Division Div Ametek Technical and Industrial Products, Inc.

6685-00-978-332155-38 INTERCHANGEABLE

Thermocouple,heating Element

Teledyne Instruments, Inc. Dba Teledyne Hastings Instruments Div Teledyne Hastings Instruments

2640-00-999-78865538 INTERCHANGEABLE

Valve,pneumatic Tire

Schrader-Bridgeport International Inc Dba Schrader Automotive

6685-01-025-56715518 INTERCHANGEABLE

Thermostat,flow Control

Gates Corporation

Cross-Reference Index

Part Number	Manufacturer
5538	Botoman Mfg Co Inc (USA)

Related Parts

5905-00-174-8067INTERCHANGEABLE

RESISTOR,FIXED,WIRE WOUND,INDUCT

K45258-500

5999-00-325-8999INTERCHANGEABLE

DELAY LINE

5950-00-441-7876INTERCHANGEABLE

TRANSFORMER,POWER

3155896

5905-00-677-0568INTERCHANGEABLE

RESISTOR SET,MATCHED

156PS120

5935-00-839-7025INTERCHANGEABLE

CONNECTOR,RECEPTACLE,ELECTRICAL

7616239P1

3460-00-895-2440INTERCHANGEABLE

INDEXING FIXTURE

55-38

6105-00-912-7345INTERCHANGEABLE

MOTOR-TACHOMETER GENERATOR

08TGSM1242-1

6685-00-978-3321INTERCHANGEABLE

THERMOCOUPLE,HEATING ELEMENT

55-38

2640-00-999-7886INTERCHANGEABLE

VALVE,PNEUMATIC TIRE

5538

6685-01-025-5671INTERCHANGEABLE

THERMOSTAT,FLOW CONTROL

5518

6550-01-146-4175INTERCHANGEABLE

CONTROL,GLUCOSE

5538

5895-01-169-1758INTERCHANGEABLE

SPEED CONTROL INDICATOR

553-8

Frequently Asked Questions

What is NSN 5305-00-637-0603?

NSN 5305-00-637-0603 is a Setscrew, manufactured by Botoman Mfg Co Inc, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-637-0603?

NSN 5305-00-637-0603 has 1 cross-referenced part number: 5538 (Botoman Mfg Co Inc).

What NSN replaces 5305-00-637-0603?

There are 12 known substitutes for 5305-00-637-0603: 5905-00-174-8067, 5999-00-325-8999, 5950-00-441-7876 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5538?

Key specifications for 5538: Width Across Flats: 0.078 INCHES NOMINAL IN; Thread Series Designator: UNF; Material: STEEL OVERALL; Nominal Thread Diameter: 0.164 INCHES IN. 11 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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