PartsTable
Technical Data Sheet
691 ✓ Verified by PartsTable
· NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The RELAY,ELECTROMAGNETIC is a the manufacturer industrial component. Key specifications include material: RUBBER NEOPRENE OVERALL, thickness: 0.438 INCHES NOMINAL IN, base_style: MIDGET GROOVED, body_width: 1.625 INCHES NOMINAL IN, bulb_style: T (TUBULAR), derivation: HUMAN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-233-5879, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
691
NSN: 5310-00-233-5879
FSC: 5310
CAGE: 60528 — TRAILMOBILE INC SUB OF THE PULLMAN CO (USA)
SPECIFICATIONS
materialRUBBER NEOPRENE OVERALL
thickness0.438 INCHES NOMINAL IN
base_styleMIDGET GROOVED
body_width1.625 INCHES NOMINAL IN
bulb_styleT (TUBULAR)
derivationHUMAN
body_height1.625 INCHES NOMINAL IN
body_length2.312 INCHES NOMINAL IN
design_typePREFORMED, SINGLE BEND, NONCONVERTIBLE VALVE
usage_designDESIGNED TO MONITOR GENERAL AND SPECIAL CHEMISTRY TESTS
adhesive_typePRESSURE SENSITIVE
hole_diameter4.125 INCHES NOMINAL IN
NSN5310-00-233-5879
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 691 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
OVERALL DIAMETER: 5.750 INCHES NOMINAL IN
MATERIAL: WOOL COMP 16R3 OVERALL
HOLE DIAMETER: 4.125 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
THICKNESS: 0.438 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLE: ROUND
CENTER HOLE SHAPE STYLE: ROUND
MATERIAL DOCUMENT AND CLASSIFICATION: C-F-206,TYPE 1,CL 16R3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER5.750 INCHES NOMINAL IN
MATERIALWOOL COMP 16R3 OVERALL
HOLE DIAMETER4.125 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
THICKNESS0.438 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
MATERIAL DOCUMENT AND CLASSIFICATIONC-F-206,TYPE 1,CL 16R3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MINIMUM TENSILE STRENGTH400 POUNDS PER SQUARE INCH LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
AB5028A-2AInterchangeable
interchangeable cross-reference
interchangeable
NN12PC561Interchangeable
interchangeable cross-reference
interchangeable
CB1S4503-1ALT5PCH60SCX10142Interchangeable
interchangeable cross-reference
interchangeable
691-850Interchangeable
interchangeable cross-reference
interchangeable
691FInterchangeable
interchangeable cross-reference
interchangeable
691Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 691?
691 is a RELAY,ELECTROMAGNETIC.
What parts can replace 691?
There are 24 known substitutes for 691: AB5028A-2A, NN12PC561, CB1S4503-1ALT5PCH60SCX10142 and 21 more. Substitute compatibility should be verified for your specific system.
Is 691 still available?
691 is currently cancelled.
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