Model: 3M55-5-3

Shoulder Screw

Special Features:

Furnished w/one o ring

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.505 inches and 0.572 inches
Fastener Length
Between 0.703 inches and 0.750 inches
Head Style
Flat countersunk undercut
Head Diameter
Between 0.629 inches and 0.634 inches
Head Height
Between 0.075 inches and 0.077 inches
Shoulder Diameter
0.3422 inches first shoulder and 0.3432 inches first shoulder
Shoulder Diameter
0.3422 inches and 0.3432 inches first shoulder
Shoulder Length
0.101 inches first shoulder and 0.123 inches first shoulder
Shoulder Length
0.101 inches and 0.123 inches first shoulder
Internal Drive Style
High-torque
Thread Diameter
0.312 inches
Thready Qty Per Inch (tpi)
24
Countersink Angle
100.0 degrees
Shoulder Shape
Round first shoulder
Part Name Assigned By Controlling Agency
Navy special project
Material
Steel
Material Specification
3-57, fscm 76301 mfr ref single material response
Surface Treatment
Cadmium
Surface Treatment Specification
3-57, fscm 76301 mfr ref single treatment response
Thread Series Designator
Unf
NSN
5305-00-224-1010
Part Number
3M55-5-3
Description
Screw,shoulder
CAGE
76301

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in.) (1.5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is designed to be driven with either a wrench or an inserted driver or both in sizes below no. 10 (0.190 in.) (5 mm) nominal diameter. No. 10 (0.190 in.) (5 mm) and larger sizes must be designed for any type of inserted driver, but may also provide for external wrenching of the head. A locking feature may be incorporated in the design of the head or threads. For items which are both shouldered and have an externally relieved body, use screw, externally relieved body. For items with a no. 10 (0.190 in.) (5 mm) or larger thread diameter without an inserted driver head, use bolt, shoulder. Excludes bolt, internal wrenching and screw, cap, socket head.

Part 3M55-5-3 NSN 5305-00-224-1010

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
22846
FIIG:
A003B0
Concept No.:
App. Key:
SL
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
096640
UFC:
50600
LTL:
70.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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