Spacer Washers / Flange / Steel, Stainless Steel / Treatment Selectable / 45-55 HRC

[ ! ] Circumference chamfering C0.5 or less

Part Number		[M] Material	[S] Surface Treatment	[ H ]Hardness
Standard Grade	Precision Grade
FTCSS	—	Steel for general structure	—	—
FTCC	FTCMC	EN 1.1191 Equiv.	—	—
FTCB	FTCMB		Black Oxide
FTCM	FTCMM		Electroless Nickel Plating
FTCR	FTCMR		Low Temp. Black Chrome Plating
FTCAA	—	2000 Series Aluminum Alloy	Clear Anodize	—
FTCAB	—		Black Anodize
FTCBBB	—	EN CW614N Equiv.	—	—
FTCSU	—	EN 1.4301 Equiv.	—	—
FTCSUR	—		Low Temp. Black Chrome Plating
FTCSK	—	EN 1.2510 Equiv.	—	55HRC or more
FTCSKB			Black Oxide
FTCSKM			Electroless Nickel Plating
FTCSUS	—	EN 1.4401 Equiv.	—	—
FTCS	FTCMS	EN 1.4125 Equiv.	—	45 to 50HRC

[ ! ] Stainless steel hardened type (FTCS, FTCMS) may be discolored by hardening.
[ ! ] I.D. part of low temp. black chrome plating may have a thinner coating or partially untreated.

■Standard Grade

Part Number	D	H	V 0.5 mm Increments (V Dimension 3 or More)	T 0.1 mm Increments	L 0.1 mm Increments
Standard Grade FTCSS FTCC FTCB FTCM FTCR FTCAA FTCAB FTCBBB FTCSU FTCSUR FTCSK FTCSKB FTCSKM FTCSUS FTCS	5.0 to 9.0 (0.5 mm Increments)	7.0 to 12.0 (0.5 mm Increments)	(Selection) 2 2.6 (0.5 mm Increments) 3.0 to 58.0	1.0 to 8.0	2.0 to 10.0
	9.5 to 20.0 (0.5 mm Increments)	11.5 to 25.0 (0.5 mm Increments)
	21 to 30 (1 mm increments)	23 to 40 (1 mm increments)
	31 to 40 (1 mm increments)	33 to 50 (1 mm increments)
	41 to 50 (1 mm increments)	43 to 60 (1 mm increments)
	51 to 60 (1 mm increments)	53 to 70 (1 mm increments)
[ ! ] Machining conditions [ ! ] T ≤ L−1   [ ! ] Machining conditions of material SKS3 equivalent (FTCSK, FTCSKB, FTCSKM) [ ! ] 2 ≤ T ≤ L−2     D H V   D H V                       For 5 to 20 D+2 ≤ H ≤ D × 1.5 V ≤ D−2      For 5 to 10 D+2 ≤ H ≤ D × 1.4 V ≤ D−2                       For 21 to 40 D+2 ≤ H ≤ D × 1.4 V ≤ D−4 For 10.5 to 30 V ≤ D−4                       For 41 to 60 D+2 ≤ H ≤ D × 1.2 V ≤ D−6   For 31 to 60 D+2 ≤ H ≤ D × 1.2 V ≤ D−6

■Precision Grade

Part Number	D	H	V 0.5 mm Increments (V Dimension 3 or More)	T 0.1 mm Increments	L 0.1 mm Increments
Precision Grade FTCMC FTCMB FTCMM FTCMR FTCMS	5.0 to 9.0 (0.5 mm Increments)	7.0 to 12.0 (0.5 mm Increments)	(Selection) 2 2.6 (0.5 mm Increments) 3.0 to 58.0	1.0 to 8.0	2.0 to 10.0
	9.5 to 20.0 (0.5 mm Increments)	11.5 to 25.0 (0.5 mm Increments)
	21 to 30 (1 mm increments)	23 to 40 (1 mm increments)
	31 to 40 (1 mm increments)	33 to 50 (1 mm increments)
	41 to 50 (1 mm increments)	43 to 60 (1 mm increments)
	51 to 60 (1 mm increments)	53 to 70 (1 mm increments)
[ ! ] Machining conditions [ ! ] T ≤ L−1   [ ! ] Machining conditions of material SKS3 equivalent (FTCSK, FTCSKB, FTCSKM) [ ! ] 2 ≤ T ≤ L−2             D H V   D H V                       For 5 to 20 D+2 ≤ H ≤ D × 1.5 V ≤ D−2      For 5 to 10 D+2 ≤ H ≤ D × 1.4 V ≤ D−2                       For 21 to 40 D+2 ≤ H ≤ D × 1.4 V ≤ D−4 For 10.5 to 30 V ≤ D−4                       For 41 to 60 D+2 ≤ H ≤ D × 1.2 V ≤ D−6   For 31 to 60 D+2 ≤ H ≤ D × 1.2 V ≤ D−6

[ ! ] When both I.D./O.D. tolerance changes are specified, the concentricity is ø0.02.
[NG] Not applicable to anodized products. [NG] Not applicable to hardened type (products with hardness indications [H]).

Alterations	Code	Spec.		Alterations	Code	Spec.
I.D. Tolerance	VKC	Changes the I.D. Tolerance to H7. Ordering Code VKC Machining conditions [ ! ]D ≥ 6 V ≥ 3   D D－V 6 to 10 D－V ≥ 2 10.5 to 20 D－V ≥ 3 21 to 30 D－V ≥ 6 31 to 40 D－V ≥ 8 41 to 50 D－V ≥ 10 51 to 60 D－V ≥ 12		O.D. Tolerance	DKC (g6) HKC (h7)	Changes the O.D. tolerance to g6 or h7. Ordering code DKC, HKC Machining conditions [ ! ] When D ≥ 43, T ≥ 1.5 [ ! ]D ≥ 6 D D－V 6 to 10 D－V ≥ 2 10.5 to 20 D－V ≥ 3 21 to 30 D－V ≥ 6 31 to 40 D－V ≥ 8 41 to 50 D－V ≥ 10 51 to 60 D－V ≥ 12

[NG] Not applicable to anodized products. [NG] Not applicable to hardened type (products with hardness indications [H]).

Alterations		Negative Tolerance	Positive Tolerance	Zero, Negative Tolerance	Zero, Positive Tolerance
Standard Grade T Tolerance	Code	TCB	TCC	TCD	TCE
	[ ! ] Applicable to standard grade	Changes shoulder thickness tolerance (T) T －0.1－0.3 Ordering code TCB	Changes shoulder thickness tolerance (T) T +0.3+0.1 Ordering code TCC	Changes shoulder thickness tolerance (T) T 0－0.2 Ordering code TCD	Changes shoulder thickness tolerance (T) T +0.2 0 Ordering code TCE

 

Alterations		Shoulder Thickness Tolerance	Negative Tolerance	Positive Tolerance	Zero, Negative Tolerance	Zero, Positive Tolerance
Precision Grade T Tolerance	Code	TSA	TSB	TSC	TSD	TSE
	[ ! ] Applicable to precision grade	Changes shoulder thickness tolerance (T) T ±0.025 Ordering code TSA	Changes shoulder thickness tolerance (T) T －0.01－0.06 Ordering code TSB	Changes shoulder thickness tolerance (T) T +0.06+0.01 Ordering code TSC	Changes shoulder thickness tolerance (T) T 0－0.05 Ordering code TSD	Changes shoulder thickness tolerance (T) T +0.05 0 Ordering code TSE