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Technical Data Sheet
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5103-56 — RING,RETAINING

✓ Government record, cited
Intellinet · BOLT SCREW
PRODUCT OVERVIEW

5103-56: RING,RETAINING.

Information carried in the form of light provides a vast array of features and benefits. _x000D_ _x000D_ Superior Transmission Distance_x000D_ It is not unusual for optical systems to go over 100 kilometres (km), or about 62 miles. _x000D_ _x000D_ Enhanced Security_x000D_ It is impossible to remotely detect a signal being transmitted within a fibre cable.

The only way to do so is by actually accessing the optical fibre itself. This makes fibre extremely attractive to governmental bodies, banks and other businesses with major security concerns._x000D_ _x000D_ No Metallic Components_x000D_ Fibre optic cable can be installed in areas with electromagnetic interference (EMI). This includes areas around utility lines, power-carrying lines and railroad tracks.

Fibre is also ideal for areas of high lightning-strike incidence. This part is cataloged in the U.S. Government catalog under NSN 5325-00-282-5344, indicating validated use in U.S.

government and defense logistics supply chains.

WHERE IT FITS
5103-56
NSN: 5325-00-282-5344
FSC: 5325 — Fastening Devices
CAGE: 79136 — TRUARC COMPANY LLC DBA WALDES TRUARC (USA)
SPECIFICATIONS
materialSTEEL
ring_styleC
usage_designEXTERNAL
inside_diameter0.491 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN
major_thickness0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationFED STD 66,1066 TO 1090 FED STD SINGLE MATERIAL RESPONSE
NSN5325-00-282-5344
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5103-56 · Intellinet ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL HARDNESS RATING: 66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
•
USAGE DESIGN: EXTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66,1066 TO 1090 FED STD SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MAJOR THICKNESS: 0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 0.491 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: C
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
USAGE DESIGNEXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66,1066 TO 1090 FED STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MAJOR THICKNESS0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
INSIDE DIAMETER0.491 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEC
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 8
N1800-56Reference document
Same NSN cross-reference
Reference document — Secondary reference
N1800-56ASReference document
Same NSN cross-reference
Reference document — Secondary reference
22327XReference document
Same NSN cross-reference
Reference document — Secondary reference
MS16632-56Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
12Z5040-13Reference document
Same NSN cross-reference
Reference document — Secondary reference
709051PC48Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5103-56?
5103-56 is a RING,RETAINING manufactured by Intellinet.
What parts can replace 5103-56?
There are 8 known substitutes for 5103-56: N1800-56, N1800-56AS, 22327X and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5103-56?
5103-56 is cataloged in the U.S. Government catalog under NSN 5325-00-282-5344. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.